In dunno so i unplugged them since it's been so cold they didn't need to be on. Now they won't come on at all. I looked at my scanner and when i let the car warm up it said they should have been on and now they won't work. My temp gauge is going crazy too. It goes way up past 260 then back down to 220. I scanned it when it was past 260 and my temp sensor said it was onlt 212? I think i'm just gonna put a mechanical temp gauge and a manual switch for the fans.